My TV has one (don't know left or right) dead speaker. Don't know if the speaker or some other component is broke. I tried a zillion settings with software, new system installs, everything. In TV mode, only one speaker also. It is still kind of loud with music and but the boot chime is not very loud at all. Could this be a simple speaker problem? I have a service manual and I will take it apart and look but just looking for an opinion from fellow owners of LC 520/550/575 and TVs!